ok... well if you're looking for anything in the 400-500WHP range...
Get yourself a Bosch 044 or a high pressure Walbro 255LPH pump... The 044 is a better pump but also costs a little more. If you're looking for 600+WHP range you'll want to get two of which ever pump you decide to go with.
As for injectors, I'm going to have to recommend these to you. They are currently the best high-z injectors on the market:
Siemens/Deka 660cc @ 3 BAR... They offer a superior spray pattern and give you a really nice idle and cruise quality. They also take very well to high pressures so if you decide to turn up the boost you can turn up the base pressure to 4-4.5 BAR.
Get them from here:
And you'll get them in a flow matched set (very important).
What have you done for a clutch?